A modern invented name, likely combining Jay and Cadence.
Jaydence is a contemporary American coinage. It most likely functions as a blend of the name Jay, which can refer to the bird or act as a diminutive, and the rhythmic name Cadence. As a modern creation, it does not have a singular traditional etymology but follows the popular trend of '-dence' suffix names.
Less common today
Jaydence isn't in the latest US Top 1000. It last peaked at #4,854 in 2012.
US births per 5-year period, 1990βpresent (SSA data).